Arrangement for the projection of lantern-pictures.



l. L/.LSSOEN a Jx STRATYHUS. AMANGEMMIT PQR THE PRGJBGTION 0F LAN'PERNPIGTURES.

APLIJA'MQH FILED JULY 26,1910. .Ywx Panama Apr. 3o, 1912.

UNITED STATES P .RICHARD MASSOHN AND JULIUS STRATHS, 0F Il" Ulli?,MSSOHN ASSGER TG i afrnnr cierren.

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earn v l ARRANGEMENT FOR THE PRQJEGTQN QF LANTERHMPCTUES.

Specification of Letters ratent.

`.ltpplicatmn filed. July 26, 1910.

Serial No. 574,011.

' of the source of light for a-secondary projection which can be usedfor various purposes, such as slight illumination of a room,

representation of a curtain, title or decora-v tion. The purpose of thissecondary project-ion is, broadly, that by optical. means, a portion ofthe rays thrown from the source of light, which are not used for theprojection of the picture, may becollected and thrown in a suitableforno on the picture screen or a special screen.

Hitherto the illumination ot the spectator-room, especially inkinematographic theaters, has been etlected by glow lamps, partiallyshaded or tinted. By this invention these lamps are quite superseded,and a uniform illumination of the room with diifused light is obtainedby meansoit a beam from the lantern apparatus, which is thrown on a flatsurface near the margin of the picture screen, so that by the raysreflected from the surface a general slight illumination of the roomresults. The reflecting surface may preferably be arranged between thelantern and the picture screen (at halt the distance or less). The useof the rays lying outside, of the beam of the picture rays is veryad\f'antageous, as these would otherwise be wasted; By a special combination of lenses or other optical means out-- side the condenser for themain cone ot' .rays the otherrays are captured, suitably guided andeconomically turned to account for lighting purposes.

An ilnportant way in which the diverted and collected rays of thesecondary projection can be used is to show the title. This can be donein various ways. A serviceable form is one in which the title is shownon the margin ot the picture field by means ot' a slide inserted in thebeam of rays)` and there it remains so long as the picture lasts when itwill be withdrawn with. the picture.

By means ozf a .mechanical slide in the beam of rays an impression maybey given of a. curtain rising at the beginning oif the performance,behind which the picture ap` pears. In another` useful form a properrepresentation of a curtain is projected, on which also the title of thepicture may be shown which is afterward replaced by the title appearingon the margin of the picture screen. Y

In the drawing the invention is shown in i two forms.

Figure l shows in horizontal section,

Apartly diagrammatic, a projecting arrangement with mechanical slides.in the' light beams. Fig. 2 shows on a larger scale, and separated fromthey surroundings, a view of a sliding arrangement. Fig. 3 shows invertical section a modified projecting arrangement which can be used atthe same time for illuminating purposes. y

From the projecting lantern o:r the light from the source b passesthrough the condenser c, the ilm--carrier (Z, the objective e and theopening of the shutter slides f, and passes as a light-beam gto thescreen it. In the apparatus c: beam p is collected by a condensing-lense' near the lside of the main condenser after which it is reflected froma mirror 7c through a second condensing lens m, then through the openingof a slide n and an objective o so as t-o cover about the same space onthe screen z as that occupied by the beam 57.

The shutter slides fand a are arrangedas follows (Fig. 2) Bothslideswork in guides g. In consequence of the arrangement ot' the slides f andn, in front of the objective c and the condenser m respectively theymust work in opposite directions in order to produce correspondingeffects upon the screen. Slide f contains the picture-opening r andslide fn, a curtain-opening s. The two openings are so arranged betweenthe, guides that during the passage of the beam through` thecurtain-opening the pictureopening is covered by the slide f (as shownten'ted mit?.

slide4 appears on the screen and the two edges by the further movementof the slides atflast fall together till the picture slide 1' curtain anadditional opening t is provided -in the slide n which likewise containsthe title of the picture.. This opening t `remains closed by asmallslide u resting on stops u of the slide n till the upper picture edgehas reached the lowervcurtain edge in the picture. Meanwhile the loweredge of the slide o is overtaken by the projection w of the carrier g,the slide/vis brought toastand which uncovers the opening t, so that thetitle appearsabove (or under) the picture which has now also beenluncovered'. 0bvi. ously the title can be shownv also on any vother placeoutside the picture or the screen. The mirror c can be adjusted by setscrews cv, Also by assistance of. the rays of the secondar'y projector,prosceniums, decorations, and such-like may be shown. If both theshutters 7c and n are arranged to cover the objectives or condenserlenses they must b moved simultaneously.

In the drawing the working connection of the slides is shown as cordspassing over rollers, but other modes of connection may of 'course beused. l

' In the arrangement shown in Fig. 3 the light source b sends the mainbeam through ,the condenser c and a secondary beam p through the lensesz' and a which are set in a tube near the condenser c. The rays lofthis' beam are thrown upon suitably-provided surfaces on the wall Lwhich may be the wall ofthe room or a specially provided screen.l

It is evident that one.or more -projectors .may be arranged around themain condenser for the purposes speciied.

We claim:

l. In an optical projecting apparatus, a source of light, a primary lenssystem positioned in operative relation with respect to said source forcollecting the main light rays Jfor the projection of a picture-upon asuitable surface, a secondary lens system positioned in operativerelation with respect to said source for collecting and projecting some'of the rays thrown from said source which are useless for projection inthe primary lens system, means whereby these latter collected rays canbe utilized for illuminating or for projecting of the representation or'a curtain, /titlgor decoration, and shiftable shuttersassociatirfgwithssaidys tems and constituting means whereby the rayscollected by one system can be pro- .said source for collectin jected'whilethe projecting of the rays collected by the other system is shutolf, the shutterfor the' secondary system provided with a pair ofopenings, one of which is adapted to allow of the projecting of thelight rays therethrough simultaneously with the projecting of the lightraysby the pri'- mary system.

2. In an optical projecting apparatus for utilizing some of t-herays'thrownfrom a source of light which are not used in the projectingof the picture,=a source of light.

mainlight ra s for the projecting of a picture, a secon ary lens systemarranged adjacent tothe primary lens system and including' a condensinglens singularly-disposed .with respect .to the pr1mary` and -a primarylens .system for collectingl the adapted 'to collect and project lthoserays thrown from said source which are uselessfor picture projectionwhereby the said col-l -lected rays can be utilized for illuminating orotherpurposes, a pair of shiftablle shutters associating with saidsystems and constituting means whereby the rayscollected by one systemcan be projected'while the projecting 'of the rays collected by theother system are `shut oil, a special shutter on the secondary shutterwhich/is adapted to allow 'v of the projecting of the light rayssimultaneously with the projecting of the light rays by the primarysystem. Y

3. In an optical projecting apparatus, a

'sourceof light, a primary lens system positioned in operative relationwith respect to the main light rays for vthe projecting o a picture upona suitable surface, a secondary lens system positioned in operativerelation with respect to said source for collecting and projecting someof the rays thrown from said source which are useless forvpict'ureprojecv tion, means whereby these latter collected rays can be lutilizedfor illuminating or for projecting of the representation of a -curtain,title or decoration, and shiftable shutters associating with saidsystems, and constituting means whereby the j ra s col-` lccted by onesystem can be projecte while the .projecting of the rays collected bythe other system 1s shut oil", one of said shutters provided with acurtain opening and the other with a picture opening, said shuttersarranged in such relation with respect to each other whereby as thatshutter prqvided with the picture opening is shifted to allow of theprojecting of the picture the effect produced will be that as of acurtain being raised behind-whichthe picture ap ears, and means wherebythe title of the picture can be projected simultaneously with theprojecting of v the= picture.

4. In an optical projecting apparatus for `utilizing someof the raysthrown from a projecting of a picture, a source of light, a primary lenssystem for collecting the main light rays for the projecting of apicture, a Secondary lens system arranged adjacent the primary lenssystem and including a condensing lens angularly-disposed with respectto the primary and adapted to collect and project some of the raysthrown from said source which are useless for picture projection wherebythe said collected rays can be utilized for illuminating or otherpurposes, a pair of shiftable shutters associating ,with said systemsand constituting means whereby the rays collected by one system can leprojected while the projecting of the rays collected by the other systemare shut olf, and the special shutter on the secondary shutterfwhich isadapted to allow of the projecting of the light rays simultane ouslywith the projecting of the light rays by the primary system, and stops0n the guiding pieces for the secondary shutter adapted to engage thespecial shutter with the secondary shutter.-

5. In an optical projecting apparatus, a source of light, a primary lenssystem po- 4 sitionedv in operative relation with respect t0 said sourcefor collecting the main light rays for the projection of a picture upona suitable surface, a secondary lens system positioned in operativerelation with respect to said source for collecting and projecting someof the rays thrown from said source which are useless for projection inthe prii\\ mary lens system, means whereby these lat-- ter collectedrays can be utilized'for illuminating or for projecting of the4representation of a curtain, title 0r decoration, and shiftableshutters associating with said systems and constituting means wherebythe rays collected by one system can be projected while the projectingof the rays collected by the 'other system is shut off, said secondaryshutter provided with means to allow of the projecting of light raystherethrough simultaneously with the projecting of the light rays by theprimary system.

In testimony whereof we have aifixed our signatures in presence of twowitnesses.

RICHARD MASSOHN. JULIUSl STRATHUS. Witnesses:

ERNEST H. LAMUMMENHOFF, EDUARD Herr.

